Carrier 69NT40-511-199 manual Sensor Mm 1-5/8 inches 35 mm 1/4 inch, Replacing Sensor RRS and RTS

Sensor 41 mm (1-5/8 inches)

6.35 mm (1/4 inch)

Figure 6-22. Sensor (RRS, RTS, SRS or STS)

f.Strip back insulation on all wiring 6.35 mm (1/4 inch).

g.Slide a large piece of heat shrink tubing over the cable, and place the two small pieces of heat shrink tubing, one over each wire, before adding crimp fittings as shown in Figure 6-23.

h.Slide the cap and grommet assembly, which was saved in step (c.), onto the replacement sensor.

i.Slip crimp fittings over dressed wires (keeping wire colors together). Make sure wires are pushed into crimp fittings as far as possible and crimp with crimping tool.

j.Solder spliced wires with a 60% tin and 40% lead Rosincore solder.

k.Slide heat shrink tubing over splice so that both ends of tubing cover both ends of crimp as shown in Figure 6-23.

Sensor

Cable	Heat Shrink
Large Heat Shrink
Tubing (1)	Tubing (2)

Figure 6-23. Sensor and Cable Assembly (RRS,

RTS, SRS or STS)

l.Heat tubing, preferably with a flameless heat gun. If not available, a propane torch will work (caution should be taken not to burn the heat shrink tubing or wire insulation). Make sure all seams are sealed tightly against the wiring to prevent moisture seepage.

m.Slide large heat shrink tubing over both splices and shrink tubing and heat as in step (l.).

CAUTION

Do not allow moisture to enter wire splice area as this may affect the sensor resistance.

n.Position sensor in unit per Figure 6-21 and check sensor resistance as detailed in section 6.23.1.

o.Reinstall the cover (if present) that was removed in step (b.) over wiring and probe holder.

NOTE

The P5 Pre-Trip test must be run to inactivate the alarm (refer to section 3.2.1).

6.23.3 Replacing Sensor (RRS and RTS)

a.Turn unit power OFF and disconnect power supply.

b.Cut cable 5 cm (6 inches) from shoulder of defective sensor and discard the defective probe only.

c.Cut one wire of existing cable 41 mm (1-5/8 inches) shorter than the other wire.

d.Cut one replacement sensor wire (opposite color) back 41 mm (1-5/8 inches). (See Figure 6-22.)

e.Strip back insulation on all wires 6.35 mm (1/4 inch).

f.Slide a large piece of heat shrink tubing over the unit cable, and place the two small pieces of heat shrink tubing, one over each wire, before adding crimp fittings as shown in Figure 6-23.

g.Slip crimp fittings over dressed wires (keeping wire colors together). Make sure wires are pushed into crimp fittings as far as possible and crimp with crimping tool.

h.Solder spliced wires with a 60% tin and 40% lead Rosincore solder.

i.Slide heat shrink tubing over splice so that both ends of tubing cover both ends of crimp as shown in Figure 6-23.

j.Heat tubing, preferably with a flameless heat gun. If not available, a propane torch will work (caution should be taken not to burn the heat shrink tubing or wire insulation). Make sure all seams are sealed tightly against the wiring to prevent moisture seepage.

k.Slide large heat shrink tubing over both splices and shrink tubing and heat as in step (j).

CAUTION

Do not allow moisture to enter wire splice area as this may affect the sensor resistance.

l.Check sensor resistance as detailed in section 6.23.1.

m.Reinstall the return sensor as shown in Figure 6-24. For proper placement of the return sensor, be sure to

SECTION 6

6-23 T-268-07